Frederick C. Clay (November 23, 1874 – October 12, 1917) was an American professional baseball player who played in three games for the Philadelphia Phillies in 1902.

He scored one run and recorded one RBI on two hits compiling a career .250 batting average.

He began his professional career with the Meridian Silverites of the Connecticut State League in 1900.

His last year in the minors was 1915 with the Chambersburg Maroons, Gettysburg Patriots, Fitchburg Burghers and Worcester Busters.

This biographical article relating to an American baseball outfielder born in the 1870s is a stub.